The SitePoint Forums have moved.

You can now find them here.
This forum is now closed to new posts, but you can browse existing content.
You can find out more information about the move and how to open a new account (if necessary) here.
If you get stuck you can get support by emailing forums@sitepoint.com

If this is your first visit, be sure to
check out the FAQ by clicking the
link above. You may have to register
before you can post: click the register link above to proceed. To start viewing messages,
select the forum that you want to visit from the selection below.

The timer for the popup is triggered by:
<BODY onLoad="Wait_W001('subpop.html',56789)" in the main window.

So, the popup is created and the contents of subpop.html are then written into it...

{Note: The hard-coded value passed to "id" in of Wait_W001(urlpop,id) will eventually be injected into the main page, most likely by using Perl or
PHP to generate the main page. For now, though, my problem is in the
popup window.}

I need to set the value for this hidden input:
<INPUT TYPE="hidden" NAME="aff_id" VALUE="">
in the form named "popform" in the popup window.